Updated openstack/openstack
Project: openstack/ceilometer  f3be73ed44ddf21866355cf77808144edeb1df39

Eliminate unnecessary search for test cases

As all unit tests lie in `ceilometer/ceilometer/tests`,
the test_command should use `ceilometer/tests` instead of `ceilometer`.

Change-Id: Idb1dade44a06c71fb5e64ca875b71633def110a5
Closes-Bug: 1368509